Boiler-setting



(No Model.)

4 SheetsSheet 1.

W. T. HILDRUP, Jr.

BOILER SETTING.

(No Model.) 4'SheetsSheet 2. W. T. HILDRUP, Jr.

BOILER SETTING. N0. 298,880. I Patented May 13, 1884,

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(No Model.) 4 Sheets-Sheet 3.

W. T. I-IILDRUP, Jr.

BOILER SETTING. No. 298,380. g/ 8881186 888 13, 1884.

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BOILER SETTING.

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SPECIFICATION forming part of Letters Patent No. 298,380, dated May 13, 1884.

Application filed September 26, 1883. (No model.)

To all whom it may concern: Be it known that 1, WILLIAM T. HILDRUP, Jr., a citizen of the United States, residing at Harrisburg, Pennsylvania, have invented new and useful Improvements in Boiler-Settings,

of which the following is a specification.

My invention relates to certain new and useful improvements in boiler-settings. It has for its object to provide a means for feeding 1O shavings, sawdust, spent bark, &c., to the firebox directly at the front and in such manner that cold drafts will not strike the heated boiler-sheets. It has also for its object to so construct and arrange the grate-bars as to pro- I 5 vide for a sufficient supply of air, and at'the same time secure the bars against warping by heat. It has also for its object to provide a specially-constructed hot-air flue in the firebridge; and with these ends in View my invention consists in the peculiar construction and arrangement of parts hereinafter fully described and specifically claimed. In order that those skilled in the art to which my invention appertains may know how to make and use the same, I will proceed to describe the construction and operation, referring by letters to the accompanying drawings, in which Figure 1 is a longitudinal section showing my improved settings. Fig. 2 is a front elevation. Fig. 3 is a side and front elevation and plan of step-bar supports. Fig. atis aplan view of the grate-bars; Fig. 5, a side elevation of the same; Fig. 6, across-section on line 3 5 00 as; Fig. 7, a similar section at 3 y. Fig. Sis a plan view of the heating-flue-bridge casting. Fig. 9 is a section at line 2 z, Fig. 8. Fig. 10 is a front elevation and section of damper-box for hot-air flue, and Fig. 11 is a similar view of damper.

Similar letters indicate like parts in the several figures.

All parts not specially referred to are of such construction and arrangement as is usual in boiler-settings, my invention relating only to the construction and arrangement of the feed-hopper, stepped grates, and fire-bridge fine.

A represents a fuel-hopper, which is arranged at the front end of the fire-box, the upper edge of the said hopper extending above the throat or opening B, between two castings or cross-beams, O D, which are built into and are flush with the faces of the side walls,which support the boiler. Upon these castings are 5 5 two pilaster-plates, E F, Figs. 1 and 2, which are anchored in place by suitable rods, built in the side walls. The pilaster-plates E F are formed integral with the furnace-frame, and are formed with projections G on their sides next to the boiler, extending outwardly and at right angles to the front face of the walls forming the ends of the hopper, and to these projections are riveted or bolted strips of iron, H, upon which rests a plate, I,which forms the front of the hopper. The front plate of the hopper is,

as will be observed by reference to Fig. 1, inclined, so that the fuel will gravitate to the fire-box, and the height of the hopper above the throat B is such that when the contents of the hopper extend above the bottom of the cross-beam or casting O the throat B is efiectually closed against the ingress of any cold drafts of air, and the hot boiler-sheets are thus protected.

J is a cross-beam or casting of the form in cross-section shown at Fig. 1, having its ends walled in similarly to the cross-beam O, and said beam J and cross-beam D serve as supports for the lower and upper ends, respect- 8o ively, of the step-bar or rider K, upon which rest the grate-bars L. The construction of these step-bars K is most clearly shown at Fig.

3, from the inspection of which it will be seen that the upper ends of the bars are cast with 8 5 lateral projections M, adapted to ride upon the cross-bar or support D, and the lower ends with right angle spaces or shoulders adapted to fit and ride upon the upper tread of the cross-bar or casting J. The upper or 0 inclined edge of the bars K are formed with a series of steps, N, upon which the grate-bars L are placed, and for the purpose of giving a broader,bearing to the grate-bars the steps N are extended beyond the body K or web, the 5 rear edge of which is curved, as shown. The longitudinal bottom grate-bars, 0, rest upon the lower step or projection of the cross-bar J and a cross-bar, P, built in the fire-bridge.

The transverse or stepped grate-bars L are 1 0 constructed, as more particularly shown at Figs. 4., 5, 6, and 7, with air spaces or openings through the top to freely admit air, and having the under side formed with longitudinal and transverse webs, as clearly shown at Figs. 5, 6, and 7, whereby great strength and protection against warping are secured.

It will be observed that by reason of the construction and arrangement of the stepped grate-bars air for combustion is admitted not only through but also between the bars, and this is an important desideratum in boiler settings of the class referred to.

In addition to the improvements already described, I arrange in the fire-bridge a castiron box-flue, Q, the peculiar construction of which will be best understood by reference to Fig. 8. The box is composed of top and sides, and, being open at the bottom, the exterior surfaces of this box are straight and practically smooth, with the exception of a projecting foot. R, at the bottom edge,which is built in the fire-brick which overlay the box, and in this way and bythe lateral projections 11 the latter is held against any movement. The edges of the sides of the box rest upon the firebrick .forming the bottom of the flue. In order to protect the box Q against warping, the interior surface of the top is strengthened by longitudinal and transverse ribs a, which are I inclined from the center outward. The firebrick placed over the box Q protect the box from the direct heat of the fire; but sufficient radial heat is obtained to thoroughlyheat any currents of air admitted through the damper S (arranged in the vertical front of the bridgewall, as clearly seen at Fig. 1) in its passage through the flue and before it reaches the combustion-chamber.

What I claim as new, and desire to secure by Letters Patent, is'

The heatingfiue box Q, constructed of castiron, open at the bottom, and provided with the foot R, and flanges b, for securing the box in place in the flre-bridge, and strengthened by the longitudinal and transverse ribs a, inclined from the center outwardly, said flue-box being arranged within thefire-bridge, substantially as hereinbefore set forth. a

In testimony whereof I have hereunto set my hand and seal in the presence of two subscribing witnesses.

W. T. HILDRUP, J R. [L. s.]

Witnesses:

J. HERVEY "IATTON, CHAS. I-I. SMALL. 

